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INDEX(3)                 BSD Library Functions Manual                 INDEX(3)

NAME
     index, rindex -- locate character in string

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <strings.h>

     char *
     index(const char *s, int c);

     char *
     rindex(const char *s, int c);

DESCRIPTION
     The index() function locates the first occurrence of c (converted to a char) in the string pointed to
     by s.  The terminating null character is considered to be part of the string; therefore, if c is `\0',
     the functions locate the terminating `\0'.

     The rindex() function is identical to index(), except that it locates the last occurrence of c.

RETURN VALUES
     The functions index() and rindex() return a pointer to the located character, or NULL if the character
     does not appear in the string.

SEE ALSO
     memchr(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strstr(3), strtok(3)

HISTORY
     The index() and rindex() functions appeared in Version 6 AT&T UNIX.  Their prototypes existed previ-ously previously
     ously in <string.h> before they were moved to <strings.h> for IEEE Std 1003.1-2001 (``POSIX.1'') com-pliance. compliance.
     pliance.

BSD                              June 4, 1993                              BSD